diff --git a/Tester/main.c b/Tester/main.c
index 423a246c..d1e33706 100755
--- a/Tester/main.c
+++ b/Tester/main.c
@@ -380,6 +380,7 @@ int main(int argc, char **argv)
         GB_set_log_callback(&gb, log_callback);
         GB_set_async_input_callback(&gb, async_input_callback);
         GB_set_color_correction_mode(&gb, GB_COLOR_CORRECTION_EMULATE_HARDWARE);
+        GB_set_rtc_mode(&gb, GB_RTC_MODE_ACCURATE);
         
         if (GB_load_rom(&gb, filename)) {
             perror("Failed to load ROM");